CN117063785A - Method for recovering degraded grassland by using leymus chinensis' tiller bud island - Google Patents
Method for recovering degraded grassland by using leymus chinensis' tiller bud island Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention relates to the field of restoration of degraded natural grasslands, in particular to a method for restoring degraded grasslands by using a leymus chinensis 'tiller bud island'. The method comprises the following steps: in the severe degraded grassland of the underground vegetative propagation library of the leymus chinensis, the grassland is recovered by a method of transplanting leymus chinensis tillering bud propagules on the basis of the advantage of strong vegetative propagation capacity of the leymus chinensis, mainly by cultivating leymus chinensis 'tillering bud islands', transplanting the 'tillering bud islands' to the degraded grassland and rapidly recovering the leymus chinensis proportion and productivity in communities by supplementing the underground vegetative propagation library.
Description
Technical Field
The invention relates to the technical field of restoration of degraded natural grasslands, in particular to a method for restoring degraded grasslands by using a leymus chinensis 'tiller bud island'.
Background
The grassland has multiple ecological and production functions of wind prevention, sand fixation, water conservation, carbon fixation, collection increase, animal husbandry development and the like, and is an important strategic resource for national ecological safety and ecological civilization construction. The leymus chinensis is one of main colonisation seeds of northern grasslands in China, has higher nutritive value for the development of young livestock and the fattening and reproduction of adult livestock, is main important forage grass of the inner Mongolia grasslands in China, and gradually reduces the leymus chinensis proportion of the meadow grasslands taking the leymus chinensis as colonisation seeds along with the degradation of grasslands, radically changes the community structure of the grasslands and gradually reduces the quantity of leymus chinensis propagules.
The leymus chinensis is perennial rhizome grass with wide tolerance, and can be used for seed propagation or rhizome propagation in asexual mode. The underground rootstock of the leymus chinensis is strong, the transverse rootstock has strong penetrating and expanding capacity, a strong and dense root network structure can be formed, and the rootstock has growing points, root nodes, rootstock buds and the like, so that the leymus chinensis is an important asexual propagation organ. On each root stem node, a new bud grows, and new branches on the ground are formed by taking out the soil to form a new grass. The better the conditions of moisture, temperature, air permeability and soil fertility, the better the rhizome buds can develop and the faster the growth. When the leymus chinensis is cultivated, the seed propagation has the problems of low germination rate, low survival rate, weak sexual reproductive capacity and the like, and the leymus chinensis rootstock asexual propagation has high survival rate, fast growth and high grass yield, so that the leymus chinensis is a rapid way for establishing leymus chinensis grasslands. Early investigation shows that after severe degradation of the Chinese inner Mongolia grassland occurs, the relative density of the Chinese inner Mongolia grassland population is reduced from 60-80% to about 10%, the number of the overwintering tillers is reduced by 89.8%, and the reduction of the Chinese inner Mongolia grassland propagules can lead to the limitation of the asexual reproduction capability, and is in a disadvantage in competition with other plant species, so that the Chinese inner Mongolia grassland is a key limiting factor for recovering the degraded Chinese inner Mongolia grassland.
The prior method mainly takes the utilization intensity reduction as main measures, including enclosure forbidden pasture, seasonal fallow pasture, zoning rotation pasture, grass cutting rotation and pasture cutting rotation, and the like, which are effective for mildly degraded pasture, but can not fundamentally recover the population of the leymus chinensis limited by the breeding mode for the pasture with severe degradation of community structures and severe lack of underground nutrition breeding libraries, so the effect is limited.
Disclosure of Invention
The invention provides a method for recovering degraded grasslands by using leymus chinensis 'tiller bud islands', which is used for recovering severe degraded grasslands taking leymus chinensis as colonic seeds.
The invention provides a degraded grassland restoration method, which comprises the following steps: transplanting the leymus chinensis bud propagules to degraded grasslands;
and mowing the degraded grassland to be transplanted, wherein the height of the remained stubble is 5-8cm.
Preferably, the leymus chinensis bud propagules of leymus chinensis are filled into seedling raising bowls and moved into degraded grasslands together.
Preferably, the seedling raising pot is spaced from the ground of the degraded grassland to form a pit.
Preferably, after the circumference of the seedling pot is filled, the uppermost end of the seedling pot is kept at a distance of 3-5cm from the ground of the degraded grassland, so that a pit is formed.
For grasslands extremely lacking in the underground nutrition propagation warehouse, the underground nutrition propagation warehouse is required to be improved by a method of supplementing the tillering bud warehouse, and the fertility and the competitiveness of the grasslands in the community are improved, so that in order to recover the grasslands using the leymus chinensis as the colonisation seeds, the degraded grassland tillering bud warehouse is required to be supplemented by a mode of cultivating leymus chinensis 'tillering bud islands', and the nutrition propagation of leymus chinensis is promoted, thereby improving the proportion of high-quality pastures in the community and the productivity on the ground, and playing the role of recovering the leymus chinensis grasslands.
The invention is suitable for recovering degraded natural grasslands with small quantity of leymus chinensis propagules, and meadow grasslands and typical grasslands can be recovered by using the invention.
According to the degraded grassland recovery method, the leymus chinensis tiller bud propagule selects a leymus chinensis artificial grass planting land or a natural leymus chinensis dominant community for tiller bud collection.
According to the degraded grassland restoration method, the tillering buds are collected by a soil sampling column method.
Preferably, the height of the soil column is 8-12cm.
Preferably, the tillering buds are collected in spring at a temperature exceeding 12 ℃.
According to the degraded grassland restoration method, the collected tillering buds are cultivated:
the cultivation comprises the steps of adding brassinolide and fertilizing;
the fertilized fertilizer comprises nitrogen fertilizer and phosphorus fertilizer.
According to the degraded grassland restoration method, the concentration of brassinosteroids is 2X 10 -5 mM。
According to the degraded grassland restoration method, the dosage of the nitrogen fertilizer is 2-10 kg/mu.
The dosage of the phosphorus fertilizer is 2-10 kg/mu.
Preferably, the nitrogen fertilizer is urea;
preferably, the phosphorus fertilizer is diammonium phosphate.
According to the degraded grassland restoration method, the transplanting is carried out in the evening or in the cloudy day.
Preferably, the transplantation is performed in 7-8 months, preferably 7 middle of the month.
According to the degraded grassland restoration method, the leymus chinensis bud propagules with the plant height of 15-25cm are transplanted.
According to the degenerated grassland restoration method, the transplanting density is 0.2-1/m 2 。
In some embodiments of the invention, the function of supplementing the underground leymus chinensis sprout library of the degraded grassland is mainly achieved by cultivating and transplanting leymus chinensis 'sprout islands' into the degraded grassland, wherein the two key processes comprise leymus chinensis 'sprout island' cultivation and transplanting.
Preferably, the evaluation of the cultivation effect of the tillering bud island is evaluated by adopting the ground productivity, the leymus chinensis density, the underground productivity and the number of the leymus chinensis buds; the restoration effect of the natural grassland function is mainly evaluated by adopting community overground productivity, high-quality pasture proportion and community density, and the restoration effect of the underground nutrition propagation library is evaluated by adopting underground productivity, leymus chinensis density, leymus chinensis proportion and underground leymus chinensis bud quantity.
Preferably, the cultivation of the 'tiller bud island' is realized by transplanting pure leymus chinensis field leymus chinensis propagules into a cultivation pot for cultivation management. The method is characterized in that a sheep grass tillering bud propagule is required to select a pure sheep grass field or a natural sheep grass dominant community which is high in plant survival rate and sufficient in underground bud library in early sowing stage for tillering bud collection, the collection time is spring, collection can be carried out when the temperature exceeds 12 ℃, soil pillars are drilled by using soil drills with the diameter of 8cm, the depth is 8-10cm, the collected soil pillars ensure that 3-5 plants of surviving sheep grass exist on the overground part, and underground root systems are more. Immediately after collection, the soil column is put into a degradable seedling bag with the diameter of 9cm and the depth of 12cm, and the gaps around the soil column are filled into local soil. And (3) after bagging, transferring to a seedling raising place for cultivation management, and ensuring the survival rate of the leymus chinensis 'tiller bud island'.
Preferably, preparing a seedling raising area of a tillering island: the seedling raising land is preferably land with flat topography, sunny leeward and fertile soil, and water pouring conditions are needed. If the conditions are proper, selecting a abandoned land or a abandoned land which is closer to the degraded grassland, selecting a place with high water and fertilizer retaining capacity as much as possible, dividing the place into the places with the width of 100cm-120cm according to the size of the terrain and the land block, turning 15-20cm according to the size of the land block, removing weeds, grass roots and broken stones from the soil with the length of about 15cm, and breaking up large soil blocks.
Preferably, the cultivation of the 'tiller bud island' needs to pay attention to the addition of brassinolide and nutrients to promote the breeding of the tiller bud library in the underground root system.
Brassinolide is a novel plant regulating substance and participates in various aspects of regulating and controlling plant growth and development, wherein the brassinolide has important regulation and control effects on root development processes of stem cell ecological niches, root tip meristematic regions, root cell growth, lateral roots, root hairs and the like of plant roots, and researches show that the brassinolide can remarkably improve the density and biomass of the leymus chinensis because the brassinolide can stimulate the formation of new roots and lateral roots of the leymus chinensis and promote the increase of rhizomes and tillers. The brassinolide is formulated into concentration of 2×10 -5 The mM solution is uniformly sprayed on the soil surface of the culture pot according to the addition amount.
Preferably, the fertilizer used for nutrient addition is: nitrogen fertilizer and phosphorus fertilizer. The nitrogen fertilizer adopts urea (CO (NH) 2 ) 2 ) Nitrogen is a major element constituting proteins, and is also a major component of chlorophyll, enzymes, nucleic acids, phospholipids, alkaloids, and glycoside; the phosphorus fertilizer adopts diammonium phosphate (N18: P) 2 O 5 46 Phosphorus is a nucleic acidThe nucleotide composition is also a major component of the cytoplasm and nucleus, and is therefore very important for plant growth. The addition of nitrogen and phosphorus can obviously promote the productivity of plants on the ground and underground, thereby playing the role of effectively promoting the germination of tillers.
Preferably, the transplanting of the 'tiller bud island' is based on the cultivation of the 'tiller bud island' with abundant underground tiller bud libraries, and the transplanting is carried out according to a certain transplanting density by matching with an earth auger with the diameter of the 'tiller bud island', and the transplanting is carried out in the cloudy day or in the evening when the evaporation amount is small, and the water is supplemented in time after the transplanting, so that the survival rate can be effectively improved.
The degraded grassland restoration method is applied to meadow grasslands and typical grasslands.
Preferably for severely degraded grasslands. The invention is suitable for recovering the grasslands with severe degeneration of the underground vegetative propagation storehouse.
The beneficial effects of the invention are that
In the severe degraded grassland of the leymus chinensis, the grassland is restored by a method of transplanting leymus chinensis bud propagules on the degraded grassland based on the advantage of strong asexual reproduction capability of the leymus chinensis, mainly, the 'tiller bud islands' are transplanted to the degraded grassland, and the leymus chinensis proportion and productivity in communities are quickly restored by supplementing an underground nutrition propagation warehouse.
The method can obviously improve the quantity of the degraded grassland tillering buds, and promote the nutrition propagation of the leymus chinensis, so that the leymus chinensis population of the degraded grassland is effectively recovered, and the effect of recovering the production function of the natural grassland is achieved.
The method for recovering the degraded grasslands is simple in management. If there is precipitation after the transplantation, no subsequent management is needed, if there is no precipitation within 15 days after the transplantation, flood irrigation is needed once, and then management is not needed.
The invention is suitable for recovering degraded natural grasslands with small quantity of leymus chinensis propagules, and meadow grasslands and typical grasslands can be recovered by using the invention.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the prior art description, and it is obvious that the drawings in the following description are some embodiments of the invention.
FIG. 1 is a diagram of the underground root system of the leymus chinensis 'tiller bud island' of the embodiment 1;
wherein, the A diagram is the root system of the 'tiller bud island' without the nutrients and the brassinolide, and the B diagram is the root system of the 'tiller bud island' with the nutrients and the brassinolide added.
FIG. 2 is a root system diagram of a single plant of leymus chinensis in example 1 of the present invention.
FIG. 3 is a schematic representation of the "tillering island" transplantation according to example 1 of the present invention.
FIG. 4 is a graph showing the effect of recovering grasslands after transplanting "tiller bud islands" in example 1 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The implementation methods in the implementation cases are all conventional methods, and experimental materials are all commercially available.
Cultivating the tillering bud island. Preparing a seedling raising bag (diameter 9.5cm, depth 13 cm), urea, diammonium phosphate and brassinolide, wherein the urea and the diammonium phosphate are prepared according to the following weight ratio of 1:1, mixing uniformly, and preparing brassinolide into a concentration of 2×10 -5 The mM solution was ready for use. Collecting underground propagules of a pure leymus chinensis field through an earth auger, filling the underground propagules in a seedling bag to form leymus chinensis 'tiller bud islands', and then adding different nutrients and brassinolide for promoting propagation of an underground tiller bud library for management.
Transplanting the tillering bud island. Transplantation experimental plot information: the experimental sample is positioned in an inner Mongolian autonomous region hulan Bei Ershi Xie Erda land pasture natural grassland recovery demonstration area, the pasture is an enclosed beating pasture, the quality of soil is reduced by successive years of non-fallow beating, and the proportion of high-quality pastures is lower than 10%. The size of the transplanted specimen is 10m wide and 10m long. Each treatment is repeated 5 times, the transplanting time is selected in the middle ten days of 7 months, and water is timely supplemented after the transplanting, so that the survival rate of the transplanting is improved.
When the plant height of the leymus chinensis 'sprout island' species grows to about 15-20cm, seedlings can be lifted, the seedling pot is watered thoroughly before the seedling is lifted, the seedlings are put on a vehicle after the seedling is lifted, a sunshade net is covered on the seedlings, water is kept, and the seedlings are transported to a degraded grassland; the seedling transplanting time is in rainy season: typically 7-8 months, before rain. The degenerated grassland to be transplanted is required to be mowed before the transplanting of the tillered bud island, the stubble remaining height is 5-8cm, and the competition between the implanted species and the local plants is reduced after mowing.
And (3) determining the places of the mowed degraded grasslands, selecting proper row spacing and plant spacing for transplanting according to the area of the grasslands, punching holes with the depth of 18-20cm by using an earth auger with the diameter of 12cm and the model of TOSRWELL (Daishweil) 68CC, integrally planting the transported seedling raising bowls into the holes, filling and compacting the periphery of the seedling raising bowls by using soil, keeping the distance between the uppermost end of the seedling raising bowl and the ground of the grasslands to form a shallow pit, and pouring 0.5-1L of water into each seedling raising bowl.
Management of "tillering island" after transplantation: if rainfall exists after the transplanting, watering is not needed, if no rainfall exists within 15 days after the transplanting, flood irrigation is needed once, and management is not needed. After the tillering island is transplanted, the detection needs to be carried out once a year, the density, the plant height and the biomass of the transplanted pasture are investigated, and the community effect and the recovery condition of the degraded grassland in the area are evaluated according to the investigation.
Example 1
The present example provides an experiment of the recovery effect of "tiller bud island" cultivation and transplantation on severely degraded grasslands.
(1) Cultivation of "tillering bud island
After the leymus chinensis propagules are transplanted into the culture pot, nutrients are added according to the following formulaAnd brassinolide: nitrogen 6 kg/mu and phosphorus 6 kg/mu, and the two are added to the soil surface of the culture pot after being uniformly mixed. The addition amount of brassinolide is 0.2kg/m 2 Brassinolide is prepared to a concentration of 2×10 -5 And (3) calculating the volume of the solution according to the surface area of the tillering island, and uniformly spraying the brassinolide solution onto the soil surface of the culture pot.
(2) Transplanting "tillering bud island
Transplanting the cultivated "tiller bud islands" rich in the underground vegetative propagule library into the degenerated grassland about 7 months and 15 days in the growing season, and transplanting 25 "tiller bud islands" (0.25 plant/m) in each sample 2 ) Uniformly distributed in 10m×10m sample. According to the invention, the diameter of the 'tiller bud island' is 9.5cm, so that a ground drill with the diameter of 10cm is selected for drilling, then the 'tiller bud island' is placed into the hole, the hole is filled with undisturbed soil, and the 'tiller bud island' is ensured to be in good and stable contact with the soil.
(3) And (3) collecting plant data:
acquisition time: about 8 months and 30 days in the same year;
the acquisition method comprises the following steps: setting 1 sample square with the size of 1 meter multiplied by 1 meter in each experimental area, and collecting the height, the plant cluster number and the species number of each species in the sample square; collecting all community overground biomass according to species, taking the community overground biomass back to a laboratory for drying and weighing and recording. The plant data acquisition results are shown in table 1.
(4) Blank control:
the size of the blank test area was 10m wide and 10m long. Each treatment was repeated 5 times without transplanting "tillering islands", and plant data was collected by the same plant data collection method as in example 1 on day 8 and 30 of the current year, and the obtained plant data information is shown in table 1.
TABLE 1 recovery effect of severely degraded grasslands on "tillering bud island" cultivation and transplantation
The controls in table 1 are: degraded natural grass without any treatment
Fig. 1 is a schematic diagram of an underground root system of a "tillering island" cultivated by the method provided in this example, wherein fig. a is a root system of a "tillering island" without nutrients and brassinolide added, and fig. B is a root system of a "tillering island" with nutrients and brassinolide added according to this example. FIG. 2 is a schematic diagram of a root system of a single plant of leymus chinensis formed by cultivating a "tillering island". FIG. 3 is a graph showing the effect of transplanting "tillering islands" according to the transplanting density of the present example. Fig. 4 is a graph showing the effect of the "tiller bud island" according to the present example after restoration of degraded grassland.
Example 2
This example provides an exploration of the different amounts of nitrogen fertilizer applied during "tillering island" cultivation, the results are shown in table 2.
1. Cultivation of tillering bud island, urea 2 kg/mu
The formula is added: urea 2 kg/mu is added in a way of uniformly spreading fertilizer on the surface of a cultivation pot of a 'tillering island', and watering is timely carried out after the fertilizer is spread, so that the urea fertilizer is promoted to be dissolved and enters the soil, and the fertilizer utilization rate is improved.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
2. Cultivation of "tillering bud island", urea 4 kg/mu
The formula is added: the urea is 4 kg/mu, the fertilizer is uniformly spread on the surface of a cultivation pot of a 'tillering island', and watering is timely carried out after the fertilizer is spread, so that the urea fertilizer is promoted to be dissolved and enters the soil, and the fertilizer utilization rate is improved.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
3. Cultivation of "tillering bud island", urea 6 kg/mu
The formula is added: the urea is 6 kg/mu, the fertilizer is uniformly spread on the surface of a cultivation pot of a 'tillering island', and watering is timely carried out after the fertilizer is spread, so that the urea fertilizer is promoted to be dissolved and enters the soil, and the fertilizer utilization rate is improved.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
4. Cultivation of tillering bud island, 8 kg/mu of urea
The formula is added: the urea is 8 kg/mu, the fertilizer is uniformly spread on the surface of a cultivation pot of a 'tillering island', and watering is timely carried out after the fertilizer is spread, so that the urea fertilizer is promoted to be dissolved and enters the soil, and the fertilizer utilization rate is improved.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
5. Cultivation of "tillering bud island", 10 kg/mu urea
The formula is added: the urea is 10 kg/mu, and the adding mode is to uniformly spread fertilizer on the surface of a cultivation pot of a 'tillering island', water is timely applied after the fertilizer is spread, urea fertilizer is promoted to be dissolved and enters the soil, and the fertilizer utilization rate is improved.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
TABLE 2 Effect of different Urea application amounts on "tillering island" cultivation Effect
The controls in table 2 are: degraded natural grass without any treatment
Example 3
This example provides an exploration of the different phosphate application rates during cultivation of the "tillering islands", and the results are shown in Table 3.
1. Cultivation of tillering islands, 6 kg/mu of urea and 2 kg/mu of diammonium phosphate
The formula is added: urea 6 kg/mu and diammonium phosphate 2 kg/mu are added in a mode of uniformly mixing urea and diammonium phosphate, uniformly spreading the mixture on the surface of a cultivation pot of a 'tillering bud island', and timely watering after spreading to promote the dissolution of the phosphorus fertilizer and the dissolution of the phosphorus fertilizer into the soil.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
2. Cultivation of tillering islands, 6 kg/mu of urea and 4 kg/mu of diammonium phosphate
The formula is added: urea 6 kg/mu and diammonium phosphate 4 kg/mu are added in a mode of uniformly mixing urea and diammonium phosphate, uniformly spreading the mixture on the surface of a cultivation pot of a 'tillering bud island', and timely watering after spreading to promote the dissolution of the phosphorus fertilizer and the dissolution of the phosphorus fertilizer into the soil.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
3. Cultivation of tillering islands, 6 kg/mu of urea and 6 kg/mu of diammonium phosphate
The formula is added: urea 6 kg/mu and diammonium phosphate 6 kg/mu are added in a mode of uniformly mixing urea and diammonium phosphate, uniformly spreading the mixture on the surface of a cultivation pot of a 'tillering bud island', and timely watering after spreading to promote the dissolution of the phosphorus fertilizer and the dissolution of the phosphorus fertilizer into the soil.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
4. Cultivation of tillering islands, 6 kg/mu of urea and 8 kg/mu of diammonium phosphate
The formula is added: urea 6 kg/mu and diammonium phosphate 8 kg/mu are added in a mode of uniformly mixing urea and diammonium phosphate, uniformly spreading the mixture on the surface of a cultivation pot of a 'tillering bud island', and timely watering after spreading to promote the dissolution of the phosphorus fertilizer and the dissolution of the phosphorus fertilizer into the soil.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
5. Cultivation of tillering islands, 6 kg/mu of urea and 10 kg/mu of diammonium phosphate
The formula is added: urea 6 kg/mu and diammonium phosphate 10 kg/mu are added in a mode of uniformly mixing urea and diammonium phosphate, uniformly spreading the mixture on the surface of a cultivation pot of a 'tillering bud island', and timely watering after spreading to promote the dissolution of the phosphorus fertilizer and the dissolution of the phosphorus fertilizer into the soil.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
TABLE 3 influence of different applied amounts of diammonium phosphate on the cultivation effect of "tillering islands
The controls in table 3 are: degraded natural grass without any treatment
Example 4
This example provides an exploration of the different amounts of brassinosteroids applied during cultivation of the "tillering island", the results are shown in Table 4.
1. Cultivation of brassinosteroids with "tillering island
The formula is added: urea 6 kg/mu and diammonium phosphate 6 kg/mu are added in a mode that urea and diammonium phosphate are uniformly mixed and then uniformly spread on the surface of a cultivation pot of a sprout island, watering is timely carried out after spreading, and nearby urea fertilizers are dissolved and enter soil. The concentration of brassinolide solution is 2×10 -5 mM, application rate 0.05kg/m 2 Evenly sprayed on the soil surface of the culture pot.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
2. Cultivation of brassinosteroids with "tillering island
The formula is added: urea 6 kg/mu and diammonium phosphate 6 kg/mu are added in a mode that urea and diammonium phosphate are uniformly mixed and then uniformly spread on the surface of a cultivation pot of a sprout island, watering is timely carried out after spreading, and nearby urea fertilizers are dissolved and enter soil. The concentration of brassinolide solution is 2×10 -5 mM, application rate 0.1kg/m 2 Evenly sprayed on the soil surface of the culture pot.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
3. Cultivation of brassinosteroids with "tillering island
The formula is added: urea 6 kg/mu, diammonium phosphate 6 kg/mu, addThe method is that after urea and diammonium phosphate are uniformly mixed, the urea and the diammonium phosphate are uniformly spread on the surface of a culture pot of a 'sprout island', and are timely watered after the spread, and nearby urea fertilizers are dissolved and enter soil. The concentration of brassinolide solution is 2×10 -5 mM, application rate 0.15kg/m 2 Evenly sprayed on the soil surface of the culture pot.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
4. Cultivation of brassinosteroids with "tillering island
The formula is added: urea 6 kg/mu and diammonium phosphate 6 kg/mu are added in a mode that urea and diammonium phosphate are uniformly mixed and then uniformly spread on the surface of a cultivation pot of a sprout island, watering is timely carried out after spreading, and nearby urea fertilizers are dissolved and enter soil. The concentration of brassinolide solution is 2×10 -5 mM, application rate 0.2kg/m 2 Evenly sprayed on the soil surface of the culture pot.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
5. Cultivation of brassinosteroids with "tillering island
The formula is added: urea 6 kg/mu and diammonium phosphate 6 kg/mu are added in a mode that urea and diammonium phosphate are uniformly mixed and then uniformly spread on the surface of a cultivation pot of a sprout island, watering is timely carried out after spreading, and nearby urea fertilizers are dissolved and enter soil. The concentration of brassinolide solution is 2×10 -5 mM, application rate 0.25kg/m 2 Evenly sprayed on the soil surface of the culture pot.
The effect index is as follows: ground productivity, leymus chinensis density, underground productivity, and the number of root tillering buds of leymus chinensis.
TABLE 4 influence of different brassinolide application amounts on the cultivation effect of "tillering islands
The controls in table 4 are: degraded natural grass without any treatment
Example 5
This example provides an exploration of the different densities at the time of "tillering island" transplantation, the results are shown in table 5.
1. "tillering island" grafting Density
Transplantation density: 9 'tiller bud islands' are transplanted into each sample, and uniformly distributed in the sample of 10m multiplied by 10m according to the number.
The effect index is as follows: ground productivity, high-quality pasture proportion, community density, leymus chinensis proportion, leymus chinensis density, underground productivity and leymus chinensis root system tiller bud number.
2. "tillering island" grafting Density
Transplantation density: each sample was transplanted with 16 "tillering islands" uniformly distributed in 10m×10m samples.
The effect index is as follows: ground productivity, high-quality pasture proportion, community density, leymus chinensis proportion, leymus chinensis density, underground productivity and leymus chinensis root system tiller bud number.
3. "tillering island" grafting Density
Transplantation density: and 25 'tiller bud islands' are transplanted in each sample, and uniformly distributed in the sample of 10m multiplied by 10m according to the number.
The effect index is as follows: ground productivity, high-quality pasture proportion, community density, leymus chinensis proportion, leymus chinensis density, underground productivity and leymus chinensis root system tiller bud number.
4. "tillering island" grafting Density
Transplantation density: 50 'tiller bud islands' are transplanted in each sample, and uniformly distributed in the sample of 10m multiplied by 10m according to the number.
The effect index is as follows: ground productivity, high-quality pasture proportion, community density, leymus chinensis proportion, leymus chinensis density, underground productivity and leymus chinensis root system tiller bud number.
5. "tillering island" grafting Density
Transplantation density: 100 'tiller bud islands' are transplanted in each sample, and uniformly distributed in the sample of 10m multiplied by 10m according to the number.
The effect index is as follows: ground productivity, high-quality pasture proportion, community density, leymus chinensis proportion, leymus chinensis density, underground productivity and leymus chinensis root system tiller bud number.
TABLE 5 influence of different "tillering island" transplantation densities on recovery effect
The controls in table 5 are: degraded natural grass without any treatment
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of recovering degraded grassland, comprising: transplanting the leymus chinensis bud propagules to degraded grasslands;
and mowing the degraded grassland to be transplanted, wherein the height of the remained stubble is 5-8cm.
2. The method for recovering degraded grassland according to claim 1, wherein the leymus chinensis bud propagule selects leymus chinensis artificial grassland or natural leymus chinensis dominant community for the collection of the leymus chinensis buds.
3. The degraded grassland restoration method as claimed in claim 2, wherein the tillers are collected by a method of taking out soil columns;
preferably, the height of the soil column is 8-12cm;
preferably, the tillering buds are collected in spring at a temperature exceeding 12 ℃.
4. A method of recovering degraded grassland according to claim 2 or 3, characterized in that the collected tillers are cultivated:
the cultivation comprises the steps of adding brassinolide and fertilizing;
the fertilized fertilizer comprises nitrogen fertilizer and phosphorus fertilizer.
5. The method for recovering degraded grasses according to claim 4, wherein the concentration of brassinosteroids is 2X 10 -5 mM。
6. The method for recovering degraded grasslands according to claim 4, wherein the amount of the nitrogen fertilizer is 2-10 kg/mu;
the dosage of the phosphorus fertilizer is 2-10 kg/mu;
preferably, the nitrogen fertilizer is urea;
preferably, the phosphorus fertilizer is diammonium phosphate.
7. The method of recovering degraded grassland according to any one of claims 1 to 6, wherein the transplanting is performed in the evening or in the cloudy day.
8. The method for recovering degraded grassland according to any one of claims 1 to 7, wherein the grafted propagules of the tillers of leymus chinensis bud have a height of 15 to 25 cm.
9. The method for recovering degraded grassland according to any one of claims 1 to 8, wherein the transplanting density is 0.2 to 1/m 2 。
10. Use of the degraded grassland restoration method of any one of claims 1-9 in meadow grasslands and typical grasslands;
preferably for severely degraded grasslands.
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